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BUTYLDIMETHICONYL PROPOXYETHYLCARBAMOYLPROPYL SILSESQUIOXANE.

Valuable CAS 1350450-58-6 / NOT REPORTED

An advanced silicone-urethane hybrid polymer that creates a flexible, three-dimensional film on skin to provide instant optical pore blurring and texture smoothing. This next-generation silsesquioxane combines the film-forming properties of traditional silicones with enhanced flexibility that moves naturally with facial expressions.

film forming emollient skin conditioning optical corrector

Science

Forms an elastic, breathable film layer that captures and diffracts light in multiple directions, creating a soft-focus blur effect that immediately minimizes the visual appearance of pores, fine lines, and uneven skin texture while maintaining skin comfort through flexible urethane linkages


Research

Medium confidence
Effective range 1–5%
Optimal

3%

Key findings

  1. 01 28-day clinical study (n=28) demonstrated significant skin texture smoothing and visible pore reduction at 1-5% concentration

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Effective concentrations start at 1% with clinical benefits observed up to 5%, making sub-1% amounts potentially insufficient for meaningful blur effects


The Formula

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Exceptionally stable with heat tolerance up to 85°C, resistant to oxidation and hydrolysis across wide pH range

Synergies

  • Dimethicone
  • Cyclopentasiloxane
  • Film-forming polymers

Conflicts

  • Strong oxidizing agents

Safety

CIR Status
Not reviewed
Max tested
15%
Pregnancy
Safe
Sensitization risk Low

While this specific modified siloxane lacks individual CIR review, silsesquioxanes as a class are well-established as safe cosmetic ingredients with extensive use history


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A sophisticated optical corrector that delivers clinically-proven pore blurring with exceptional formulation stability and universal skin compatibility.


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